This patch will create a sound effect that occasionally plays when the P-Switch or directional coins are on. It's similar to the effect in A Super Mario Thing, but when the countdown timer goes below a certain point, the ticking sound will start occurring at a higher frequency.
True. Actually, there's a much better workaround in AMK itself that doesn't require any patch. You can go in "asm/SNES/tweaks.asm", open the file and change the "!PSwitch" define value to "00". The level song won't stop and you'll get the desired effect from this ticking sound patch.